Hi...excuse my ignorance on this topic. I would like to buy a powerbook g5, but will certainly wait for rev. B which is very far off. However, my dual 500 mhz. sawtooth (996 RAM) runs out of processor steam frequently with heavy Pro Tools files. My question is: for the 6 or 700 dollars, are 3rd party dual processor upgrades reliable and worthwhile? I was looking at the dual 1.4 ghz processor (forgot what brand) to space the 1-1.5 year gap from now until the g5 rev B P-book. Are there any significant chances that the processor will fail and I won't have any computer? Do I need extra fans etc.? Is the processor going to make that much of a difference with the older system architecture? Are there some brands I should avoid? For the record, I am handy with electronics. Any help would be much appreciated! Thanks!